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Gravity Probe B

Testing Einstein's Universe

WEEKLY HIGHLIGHTS FOR WEEK ENDING 26 February 1999:

STANFORD HIGHLIGHT
A rework of the 2 TRE units has been completed and interim functional testing is under way. The results from functional testing appear encouraging.

Photo: Top of GP-B Telescope where the electronics are placed.

SPACE VEHICLE HIGHLIGHT
All eighteen (16 flight units plus two flight spares) Relativity Mission (GP-B) Thruster Isolation Valves (TIVs) successfully completed their leak, burst pressure and three-axis random vibration acceptance testing. Each TIV will now be functionally tested in a thermal vacuum environment before being authorized for installation on the space vehicle.
Photo: LMMS engineer Mitch Skinner and Quality Assurance Representative Carla Barnes random vibration testing a Relativity Mission Thruster Isolation Valve (TIV) in LMMS Building 181.

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